Grading Rubric is HERE
Precambrian
Cambrian
Cambrian
Ordovician
Silurian
Devonian
Devonian
Carboniferous
Permian
Jurassic
Jurassic
Triassic
Cretaceous
Cretaceous
Tertiary
Quaternary
Precambrian
Cambrian
Cambrian
Ordovician
Silurian
Devonian
Devonian
Carboniferous
Permian
Jurassic
Jurassic
Triassic
Cretaceous
Cretaceous
Tertiary
Quaternary